<ul>

<li><b>Design</b><ul>
	<li>Didn't have ideas very clear when developing the in-order tree iterator,
	leading to an almost trial & error programming which took a long and stupid
	time.</li>
	</ul>
</li>
<li><b>Style/Clarity</b><ul>
	<li>Class design inconsistency; usually variables are preceded by '_' and
		are private. This time are public and without the underscore, so it
		happened to refer to a parameter which in this case was named as
		the instance variable.</li>
	</ul>
</li>

</ul>